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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 926 · 40 questions
TalentJR

The method (LCM, then take away): Find the LCM of the two bottom numbers. Change each fraction to that bottom number. Subtract the tops, keep the bottom, and simplify.

NameDateTime takenScore ___ / 40
  1. 1.1/4 − 1/7 =
  2. 2.A bottle has 1/3 litre of juice. Anaya drinks 1/7 litre. How much juice is left (in litres)? =
  3. 3.7/8 − 1/6 =
  4. 4.3/4 − 3/8 =
  5. 5.8/9 − 1/3 =
  6. 6.6/7 − 1/4 =
  7. 7.Meera has a ribbon 1/4 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  8. 8.A tank is 3/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  9. 9.1/3 − 1/7 =
  10. 10.1/3 − 1/9 =
  11. 11.Vihaan has a ribbon 2/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  12. 12.A tank is 3/5 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  13. 13.A tank is 7/8 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =
  14. 14.Aarav has a ribbon 5/7 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  15. 15.Kabir has a ribbon 5/7 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  16. 16.Sara has a ribbon 5/8 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  17. 17.4/9 − 1/3 =
  18. 18.A bottle has 7/8 litre of juice. Rohan drinks 1/4 litre. How much juice is left (in litres)? =
  19. 19.9/10 − 4/5 =
  20. 20.2/5 − 1/4 =
  21. 21.A tank is 8/9 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  22. 22.A tank is 6/7 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  23. 23.7/10 − 2/5 =
  24. 24.7/9 − 2/3 =
  25. 25.4/5 − 3/10 =
  26. 26.4/5 − 7/10 =
  27. 27.A bottle has 1/4 litre of juice. Meera drinks 1/7 litre. How much juice is left (in litres)? =
  28. 28.Sara has a ribbon 2/3 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  29. 29.4/5 − 1/10 =
  30. 30.Vihaan has a ribbon 2/5 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  31. 31.1/2 − 2/7 =
  32. 32.5/8 − 1/4 =
  33. 33.A bottle has 8/9 litre of juice. Riya drinks 1/2 litre. How much juice is left (in litres)? =
  34. 34.5/7 − 2/3 =
  35. 35.5/6 − 7/10 =
  36. 36.A bottle has 2/9 litre of juice. Kabir drinks 1/6 litre. How much juice is left (in litres)? =
  37. 37.1/4 − 1/5 =
  38. 38.5/6 − 4/5 =
  39. 39.A tank is 5/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  40. 40.A bottle has 5/6 litre of juice. Rohan drinks 1/3 litre. How much juice is left (in litres)? =

Answer key

  1. 3/28
  2. 4/21
  3. 17/24
  4. 3/8
  5. 5/9
  6. 17/28
  7. 1/12
  8. 2/21
  9. 4/21
  10. 2/9
  11. 1/28
  12. 7/20
  13. 1/8
  14. 1/21
  15. 1/21
  16. 7/24
  17. 1/9
  18. 5/8
  19. 1/10
  20. 3/20
  21. 7/18
  22. 5/14
  23. 3/10
  24. 1/9
  25. 1/2
  26. 1/10
  27. 3/28
  28. 5/12
  29. 7/10
  30. 3/20
  31. 3/14
  32. 3/8
  33. 7/18
  34. 1/21
  35. 2/15
  36. 1/18
  37. 1/20
  38. 1/30
  39. 2/9
  40. 1/2

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